+0

Trig, how do I find missing side?

0
102
3
I'm doing this trig problem where it gives me a hypotenuse of 6, two missing legs, and a 40 degree angle, it wants me to find the measure of one leg (x), but I don't know what process I should go through. Should I use the Pythagorean theorem or should I use the fact that x/6( the hypotenuse) = the 40 degree angle? please help!
Guest Feb 21, 2012

#3
+88014
+5

You can't use pythagoras because you only have 1 side.

So you have to use trig.

depending on where you put the 40 degrees it could be cos or sin.

See if this helps.

http://www.mathsisfun.com/algebra/trig-finding-side-right-triangle.html

Melody Feb 18, 2015
Sort:

#1
0
depending where the angle is, as to how it relates to the sides, I would
use the sine, cosine, or tangent functions to find the unknown sides.
Guest Feb 21, 2012
#2
+5

take the sine of the angle times the hyp. this will give you the side opp.

Rustynut "jus get n by "

Guest Feb 17, 2015
#3
+88014
+5

You can't use pythagoras because you only have 1 side.

So you have to use trig.

depending on where you put the 40 degrees it could be cos or sin.

See if this helps.

http://www.mathsisfun.com/algebra/trig-finding-side-right-triangle.html

Melody Feb 18, 2015

2 Online Users

We use cookies to personalise content and ads, to provide social media features and to analyse our traffic. We also share information about your use of our site with our social media, advertising and analytics partners.   See details